My Bus. This thing has gone through many wheel/brake setups.
All have these common elements, 4.75" narrowed beam , 3.5" spindles, IRS conversion with wagenswest kit using 944 steel arms.
First off: 944NA brakes, 15x6et36 cookies, 175/55F 185/65R.
Last summer:
17x7et55 (205/40) and 17x8.5et55(235/45) techno-twists. On 944NA brakes, used 12mm rear spacer.
This summer: 16x6et50, 16x7et40 boxster split stars, with 205/40F and 225/50R on 964 C2 brakes.
I also had 17x7et55 and 17x9et55 Cup II's on the bus with the 944NA brakes, but can't find any pics. The rear was a SQUEEZE, but it fit.